Hard Disk Drive

While disk manufacturers strive to accommodate increasing amounts of data on the surface of a media disk, performance parameters are becoming increasingly stringent. With the recent introduction of perpendicular recording (also called "vertical recording" - a method of digital recording on a magnetic disk in which the bits are in a vertical arrangement instead of horizontal in order to take up less space; expected to materialize with areal densities exceeding 200 gigabits per square inch), the step change in performance requirements has proved challenging throughout the industry.  As these developments have caused an increase in demand for improved torque ripple and resonance performance, manufacturing costs continue to be squeezed.

Tolerance Rings can be used to mount the bearing assembly or bearing cartridge into the actuator arm. This is a key link within the disk drive and significantly improves resonance and torque ripple performance.  This is achieved while reducing the overall cost of the assembly due to the quick assembly cycle time associated with the tolerance ring solution.
An R&D led approach allows Rencol to continue to develop the tolerance ring to meet the new challenges that exist with the progress of every new product generation.

This technically led approach has resulted in the tolerance ring solution to be included in almost 40% of the world’s 2.5” and 3.5” Hard Disk Drives.  This figure is projected to increase year on year.

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